Hey, quit picking on us old guys!
I agree with the others. The smaller shops that have been around for a while, along with good personal advice, is the best way to go.
I don't always go by the number of cars in the lot. Just some personal experiences with that. One was a local repair shop at a gas station. They couldn't even find a no start problem where the was a TSB. Lots of codes thrown, as the fuel tank sensor would short out and remove voltage from the other sensors...just like the TSB said. Blamed the owner of "fiddling with it" and putting too many problems in for them to fix. Lots of cars in that lot.
The other is a current situation. Owner former (current?) drug dealer, along with other nefarious dealings. Started a service shop. Told one little old lady the engine had seized, and it was Valvoline'* (where my son works) fault. Manager went to check out the car, per corporate'* orders. (The manger even referred people there for service.) He was surprised to see the engine crank fine. Long story short...they had pulled all the plugs on the car, so it wouldn't start. Lots of cars in his lot, but he advertises.
Take all 3 together, though...I'd say you have a winner.